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Narrated Ziyad bin Jubair:

A man went to Ibn 'Umar I. and said, "A man vowed to fast one day (the sub-narrator thinks that he said that the day was Monday), and that day happened to be 'Id day." Ibn 'Umar said, "Allah orders vows to be fulfilled and the Prophet forbade the fasting on this day (i.e. Id)."
حَدَّثَنَا مُحَمَّدُ بْنُ الْمُثَنَّى، حَدَّثَنَا مُعَاذٌ، أَخْبَرَنَا ابْنُ عَوْنٍ، عَنْ زِيَادِ بْنِ جُبَيْرٍ، قَالَ جَاءَ رَجُلٌ إِلَى ابْنِ عُمَرَ ـ رضى الله عنهما ـ فَقَالَ رَجُلٌ نَذَرَ أَنْ يَصُومَ يَوْمًا، قَالَ أَظُنُّهُ قَالَ الاِثْنَيْنِ، فَوَافَقَ يَوْمَ عِيدٍ‏.‏ فَقَالَ ابْنُ عُمَرَ أَمَرَ اللَّهُ بِوَفَاءِ النَّذْرِ، وَنَهَى النَّبِيُّ صلى الله عليه وسلم عَنْ صَوْمِ هَذَا الْيَوْمِ‏.‏

Classification

Sahih (Authentic)

References

• Sahih al-Bukhari, 1994
• Sahih al-Bukhari, Vol. 3, Book of Fasting, Hadith 214
• Sahih al-Bukhari, Book of Fasting, Hadith 214